Force helm posframe to respect min-(width|height)

And enable solaire-mode if available, and unused in origin buffer (to
make it easier to see posframe over non-solaire-mode buffers).

modules/completion/helm/autoload/posframe.el

@@ -16,17 +16,40 @@ bottom, which is easier on the eyes on big displays."
 ;;;###autoload
 (defun +helm-posframe-display (buffer &optional _resume)
   "TODO"
-  (require 'posframe)
   (setq helm--buffer-in-new-frame-p t)
+  (let ((solaire-p (bound-and-true-p solaire-mode))
+        (params (copy-sequence +helm-posframe-parameters)))
+    (let-alist params
+      (require 'posframe)
       (posframe-show
        (setq +helm--posframe-buffer buffer)
        :position (point)
        :poshandler +helm-posframe-handler
-   :override-parameters +helm-posframe-parameters)
+       :width
+       (max (cl-typecase .width
+              (integer .width)
+              (float (truncate (* (frame-width) .width)))
+              (function (funcall .width))
+              (t 0))
+            .min-width)
+       :height
+       (max (cl-typecase .height
+              (integer .height)
+              (float (truncate (* (frame-height) .height)))
+              (function (funcall .height))
+              (t 0))
+            .min-height)
+       :override-parameters
+       (dolist (p '(width height min-width min-height) params)
+         (setq params (delq (assq p params) params)))))
+    ;;
     (unless (or (null +helm-posframe-text-scale)
                 (= +helm-posframe-text-scale 0))
       (with-current-buffer buffer
-      (text-scale-set +helm-posframe-text-scale))))
+        (when (and (featurep 'solaire-mode)
+                   (not solaire-p))
+          (solaire-mode +1))
+        (text-scale-set +helm-posframe-text-scale)))))
 
 ;;;###autoload
 (defun +helm|posframe-cleanup ()

modules/completion/helm/config.el

@@ -26,10 +26,10 @@ be negative.")
 
 (defvar +helm-posframe-parameters
   '((internal-border-width . 8)
-    (min-width . 80)
-    (min-height . 16)
     (width . 0.5)
-    (height . 0.55))
+    (height . 0.35)
+    (min-width . 80)
+    (min-height . 16))
   "TODO")